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More engine info needed
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Posted by Ari [Email] (#2847) [Profile/Gallery] (more from Ari) on Wed, 23 Aug 2006 05:25:05 Share Post by Email
In Reply to: Rough running, Derek, Tue, 22 Aug 2006 19:57:22
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Where are you located? The reference to Kms implies you aren't in the US. In '94 there were a lot of different engines/FI systems in the world, and CS really only applies to body style outside the US.

2.0 or 2.3l engine? Turbo or N/A? Do you know if you have Trionic or LH2.4.2? LH will have an AMM in the fat intake line to the throttle body. Trionic won't - instead, there will be a small MAP sensor bolted to the firewall on the right hand side of the engine compartment (looking forward), with a vacuum line running to the intake plenum.

When the engine is hot, it stalls once you give it any gas. Can you coax it to run any at all beyond that - is it driveable? When the car is warmed up as you drive down the road at speed, does it stumble and lose power, or does the problem only show up after you've come to an idle and try and accelerate?

I doubt it's the CPS. The engine wouldn't idle with a bad CPS - it would just shut off.

If you can't get the engine speed up at all, and if it stumbles and dies when driving at speed, I'd suspect the fuel pump. How did the spark plugs look - was the color good, or did they look like the engine was running rich or lean?

If you can get it to run off-idle, but it's the acceleration from idle that's an issue, I'd suspect the AMM (LH) or MAP (Trionic). But more info would be helpful.

As always, check for bad vacuum lines. Once you've found a bad one, fix it and keep looking - vacuum leaks come in packs.



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